Amirkabir University of Technology AUT Journal of Electrical Engineering 2588-2910 58 1 2026 01 01 Efficient Control and Five-Level MMC Integration for Power Quality Improvement in DFIG-Based Wind Energy System 45 58 5866 10.22060/eej.2025.24305.5677 EN Kunche Gowthami Department of Electrical and Electronics Engineering, Godavari Institute of Engineering and Technology, Rajahmundry, India. Dondapati Ravi Kishore Department of Electrical and Electronics Engineering, Godavari Global University, Rajahmundry, India. 0000-0002-2567-2888 Inti Sai Deepthi Department of Electrical and Electronics Engineering, Godavari Institute of Engineering and Technology, Rajahmundry, India. Kolapati Durga Prasad Department of Electrical and Electronics Engineering, Godavari Institute of Engineering and Technology, Rajahmundry, India. Gandham Satish Kumar Department of Electrical and Electronics Engineering, Godavari Institute of Engineering and Technology, Rajahmundry, India. Journal Article 2025 06 21 Main objectives of the study are to address Power Quality (PQ) problems caused by shifting load demands, including voltage instability and harmonic distortion, which affect system performance and reduce stability. In order to achieve the set goals, the following tasks were accomplished: the design and implementation of a 5-Level Modular Multilevel Converter (MMC) powered by a Double Fed Induction Generator (DFIG)-based wind system, the application of advanced control techniques utilizing D-Q theory and a Hysteresis Current Controller (HCC) for stable current injection, and the incorporation of an LC filter to enhance AC supply quality. The most important results are the reduction of total harmonic distortion (THD) to 1.35%, enhanced voltage stability, and improved overall PQ, validated through MATLAB simulations. The significance of obtained results is the development of a robust and efficient system that addresses PQ issues, offering a substantial improvement over state-of-the-art methods and ensuring high-quality power delivery to grid. https://eej.aut.ac.ir/article_5866_a7471fdc77b3435276507cc8f2dc2569.pdf